Outdoor Gear (Tents, Sleeping Bags)

Material Composition Assumptions

The default bill of materials for a representative 2-person backpacking tent (approximately 3 kg, including poles, rainfly, footprint, and stuff sack) includes:

• Fly and canopy fabric (nylon ripstop or polyester taffeta): The largest single material by area, approximately 1.0–1.3 kg total. Nylon ripstop (often 30–40 denier) carries approximately 6–10 kgCO2e/kg. Polyester taffeta alternatives are slightly lower at ~3.5–5.0 kgCO2e/kg.
• DWR (Durable Water Repellent) coating: Applied to the fly and sometimes canopy fabric. Traditional fluorinated DWR (PFAS-based, C8 or C6 chemistry) raises the fabric’s embedded chemical intensity. Non-fluorinated alternatives (silicone-based, wax-based) are increasingly common after regulatory pressure. DWR chemistry is not a major mass fraction but involves complex fluoropolymer synthesis with high functional unit emissions.
• Aluminum poles: Typically 7001 or 7075 alloy tubing, approximately 0.5–0.8 kg per tent. Primary aluminum at ~8–12 kgCO2e/kg dominates; the extrusion and anodising steps add ~1–2 kgCO2e/kg more. DAC (Dongah Aluminium Corporation, Korea) supplies the majority of the global premium tent pole market.
• Steel stakes and guylines: Approximately 0.15–0.25 kg of cold-rolled steel and polypropylene or Dyneema cord.
• Hardware (zippers, buckles, clips, velcro): Approximately 0.15–0.3 kg. YKK zippers dominate the outdoor gear market; nylon coil zippers require caprolactam feedstock and precision injection moulding for sliders.
• Seam tape (polyurethane): Applied to all seams on the rainfly for waterproofing, approximately 0.05–0.1 kg.
• Stuff sack and packaging: Typically nylon or polyester pouch plus cardboard box, approximately 0.1–0.2 kg combined.

For sleeping bags, the reference product is a synthetic-fill 3-season bag (~1.2 kg):

• Shell and lining fabric: Nylon or polyester ripstop/taffeta, approximately 0.4–0.5 kg total.
• Synthetic insulation (polyester fill): PrimaLoft, Thermo-Lite, or similar hollow-fibre polyester batting, approximately 0.4–0.6 kg at ~3.5–4.5 kgCO2e/kg.
• Down insulation alternative: Responsibly Sourced Down (RSD) or Responsible Down Standard (RDS)-certified goose or duck down, approximately 0.3–0.5 kg. Down production carries approximately 2.5–5.0 kgCO2e/kg depending on sourcing and processing country, with significant animal welfare and land-use considerations.
• Zipper, baffles, draft collar hardware: Approximately 0.1–0.15 kg.

Why the Score Is What It Is

Outdoor gear carries a high per-kg emission intensity (11.7 kgCO2e/kg) relative to other textile categories because it concentrates several of the most carbon-intensive fibres and coatings — nylon, DWR fluoropolymers, and aluminum — in relatively low-mass products where there is no dilution from lower-cost filler materials.

Nylon ripstop fabric is the dominant emissions driver. The caprolactam or adipic acid routes to nylon-6 and nylon-6,6 respectively are among the most energy-intensive in synthetic fibre production. Historically, nylon-6,6 production also co-generated significant quantities of nitrous oxide (N2O) as a process byproduct of adipic acid synthesis; N2O has a global warming potential approximately 265 times that of CO2 over a 100-year horizon. While most major producers have installed N2O abatement catalysts, some smaller-scale and older production facilities still emit at partially abated rates. Ecoinvent datasets reflect average abatement penetration, which may understate emissions from less regulated producers.

Aluminum tent poles have a substantial per-kg footprint driven entirely by primary smelting energy. The 7000-series high-strength alloys used in tent poles require specific alloying and heat treatment steps that add modest additional processing emissions beyond the base smelting footprint. DAC’s poles are manufactured in Korea (~400 gCO2e/kWh grid) rather than China, providing a moderate grid intensity advantage over Chinese aluminum products.

DWR coatings are chemically complex and their emissions are poorly captured in standard material-level LCAs. PFAS-based fluorinated DWRs (particularly long-chain C8 chemistry, now banned in most markets) involve perfluorooctanoic acid (PFOA) synthesis routes with high embedded energy and persistent environmental burden. The transition to C6 and non-fluorinated DWR reduces the persistent pollution risk but does not dramatically reduce manufacturing emissions — all DWR systems require fluoropolymer or silicone feedstocks from energy-intensive chemical processes.

The insulation fill category creates a meaningful choice-point. Down is lower-carbon per gram of insulating capacity than synthetic (polyester) alternatives, but this comparison depends heavily on sourcing. Live-plucked or force-fed down carries ethical concerns that have driven major brands (REI, Arc’teryx, Patagonia) toward RDS certification, which adds supply chain traceability costs.

What Drives Variation

Fabric fibre choice is the strongest single lever for outdoor gear footprint. A tent or sleeping bag specified with polyester taffeta rather than nylon ripstop reduces fabric-related emissions by approximately 30–50% per kilogram of fabric. The trade-off is weight and packability: nylon has better strength-to-weight and is preferred for ultralight designs. Some brands (Hyperlite Mountain Gear, Zpacks) use Dyneema Composite Fabric (DCF, formerly Cuben Fiber) — ultra-high-molecular-weight polyethylene laminates — which is very low mass but carries high per-kg embodied carbon (~15–25 kgCO2e/kg) and essentially zero recyclability.

DWR chemistry affects both emissions and end-of-life. Brands that have fully transitioned to PFC-free DWR (e.g., Bluesign-certified non-fluorinated treatments) remove PFAS from the product life cycle. From a pure manufacturing emissions standpoint, the difference between fluorinated and non-fluorinated DWR is moderate (10–20% on the fabric treatment contribution), but from a regulatory and circular economy standpoint the distinction is significant.

Pole material varies across product tiers. Fibreglass poles (common in budget tents) have lower per-kg embodied carbon than aluminum (~2–4 kgCO2e/kg for fibreglass vs. ~9–14 kgCO2e/kg for primary aluminum poles) but are heavier and less repairable. Carbon fibre poles (ultralight premium segment) have very high per-kg emissions (~20–30 kgCO2e/kg) but dramatically reduce pole mass — the net effect per tent is product-specific.

Insulation type and weight scales linearly with total footprint for sleeping bags. A lightweight ultralight quilt (300 g down fill) will have a substantially lower total footprint than a heavy winter bag (700 g synthetic fill). Temperature rating strongly influences fill weight and therefore overall emissions; a 4-season bag may carry 2–3× the fill mass of a summer bag.

Manufacturing location affects Scope 2 proportionally. Tent and sleeping bag production is labour-intensive (cutting and sewing) and predominantly located in China, Vietnam, and Bangladesh. A brand sourcing cut-and-sew from a Vietnamese factory with grid intensity ~490 gCO2e/kWh rather than China (~565 gCO2e/kWh) reduces Scope 2 by approximately 13%, a relatively modest adjustment compared to the upstream material choices.

Durability and repairability are material to lifetime amortised footprint. Many outdoor gear brands (REI, Patagonia, MSR) offer repair services for tents and sleeping bags, extending product life by 3–10 years. A tent used for 200 nights rather than 50 nights carries one-quarter the per-use emissions, making longevity the single most impactful variable for consumers.

Methodology Notes

• CCI score of 35 kgCO2e represents a mid-range estimate for a standard 2-person backpacking tent at approximately 3 kg, cradle-to-gate. Estimates range from ~15 kgCO2e for a simple polyester festival tent to ~80 kgCO2e for a 4-season expedition tent with aluminum poles, nylon fabric, and extensive hardware.
• Scope breakdown: Scope 3 dominates at ~76% (26.5 kgCO2e), driven by upstream fabric, insulation, and pole material extraction and processing. Scope 2 accounts for ~20% (7.0 kgCO2e) from fabric production, extrusion, and assembly electricity. Scope 1 is ~4% (1.5 kgCO2e) from facility process heat.
• Functional unit: One 2-person backpacking tent, approximately 3 kg assembled, including poles, rainfly, inner tent, and stuff sack, cradle-to-gate.
• Confidence is medium because outdoor gear involves a wide range of proprietary material formulations, few manufacturers publish full product-level LCAs (Patagonia is an exception), and DWR chemistry emissions are not well captured in standard Ecoinvent datasets.
• Category breadth: Outdoor gear encompasses products ranging from ultralight single-wall bivy sacks (~0.3 kg, ~5–8 kgCO2e) to large family tents (~10–15 kg, ~100–150 kgCO2e) and sleeping bags rated from summer to expedition conditions. The per-kg figure of 11.7 kgCO2e/kg is most applicable to nylon-dominant products with aluminum structure.